package Thinking;

class Shape {
	void draw() {
		
	}
	
	void erase() {
		
	}
}

class Circle extends Shape {
	void draw() {
		System.out.println("Circle.draw()");
	}
	
	void erase() {
		System.out.println("Circle.erase()");
	}
}

class Square extends Shape {
	void draw() {
		System.out.println("Square.draw()");
	}
	
	void erase() {
		System.out.println("Square.erase()");
	}
}

class Triangle extends Shape {
	void draw() {
		System.out.println("Trangle.draw()");
	}
	
	void erase() {
		System.out.println("Trangle.erase()");
	}
}

class Shapes {
	public static Shape randShape() {
		switch((int)(Math.random() * 3)) {
			default:
			case 0: return new Circle();
			case 1: return new Square();
			case 2: return new Triangle();
		}
	}
	
	public static void main(String[] args) {
		Shape[] s = new Shape[9];
		
		for(int i = 0; i < s.length; i++) 
			s[i] = randShape();
		
		for(int i = 0; i < s.length; i++)
			s[i].draw();
	}
	
}







